Placing the elastic can be somewhat difficult so here some extra instructions

Paint Chip Card Holders!

The other I found at designverb.com
They look awesome don’t they!!
In the Netherlands we don’t have Home Depot or a shop that uses these cards but why don’t use a cereal box or other box made out of carton (or just design one…).

There is a .JPG template
This template can be use to modify it to your own business card dimensions:

To change the size of the template, make ‘a’ the height of your card, and ‘b’ the thickness that you want the card holder to be.